We use the estimated mask \(\mathbf {\mathrm {M}}^{s}\)  from the MCSDN for mask-based beamforming. We employ minimum variance distortionless response (MVDR) beamforming [1]}, which is optimized with a constraint that minimizes the power of the noise without distorting the target speech. One solution is:
\(\mathbf {\mathrm {w}}_{f} = \frac{(\mathbf {\mathrm {\Phi }}_{f}^{n})^{-1}\mathbf {\mathrm {\Phi }}_{f}^s}{\text{Trace}({(\mathbf {\mathrm {\Phi }}_{f}^{n})^{-1}\mathbf {\mathrm {\Phi }}_{f}^s})}\mathbf {\mathrm {u}},\) 
